The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 28, 2009
Filed:
Jan. 30, 2007
Narsingh Bahadur Singh, Ellicott City, MD (US);
Aaron A. Pesetski, Gamrills, MD (US);
Andre Berghmans, Owing Mills, MD (US);
Brian P. Wagner, Baltimore, MD (US);
David Kahler, Arbutus, MD (US);
David J. Knuteson, Columbia, MD (US);
Darren Thomson, Ellicott City, MD (US);
Narsingh Bahadur Singh, Ellicott City, MD (US);
Aaron A. Pesetski, Gamrills, MD (US);
Andre Berghmans, Owing Mills, MD (US);
Brian P. Wagner, Baltimore, MD (US);
David Kahler, Arbutus, MD (US);
David J. Knuteson, Columbia, MD (US);
Darren Thomson, Ellicott City, MD (US);
Northrop Grumman Systems Corporation, Los Angeles, CA (US);
Abstract
A nuclear radiation detection system using narrowband UV crystal filters is disclosed. Since the photons produced during the decay of β- and γ-radiation can be detected in the spectral range of about 200-350 nm (the ultraviolet range), UV filter based photo sensors are utilized for detection. The nuclear radiation detection system comprises an optical assembly capable of focusing on a source of radiation, a UV filter assembly having a narrowband UV crystal filter and positioned to receive light transmitted through the optical assembly, and a light detector positioned to receive light transmitted through the UV filter assembly. The narrowband UV crystal filter is fabricated from crystals selected from the group consisting of nickel fluorosilicate, nickel fluoroborate, and potassium nickel sulfate. The nickel fluorosilicate, nickel fluoroborate, and potassium nickel sulfate may be doped to achieve even narrower band filter. The radiation detection system can be used to monitor contamination in a nuclear plant or a nuclear waste dump site. It may also be used for surveillance of contamination in case of a nuclear accident.